(Year-round Factory Cultivation of Leafy Vegetables) Pointed Roof Ventilation Commercial Gothic Multi-span Greenhouse Manufacturer・SAINPOLY 1

(Year-round Factory Cultivation of Leafy Vegetables) Pointed Roof Ventilation Commercial Gothic Multi-span Greenhouse Manufacturer・SAINPOLY

The SAINPOLY Gothic Greenhouse is developed for year-round factory cultivation of leafy vegetables. The pointed roof enables efficient natural ventilation. Combined with the triple evaporative pad cooling system, it keeps internal temperature below 28℃ in summer. The ebb-and-flow irrigation system saves 30–40% water. Directly supplied by the source factory, we provide full-process services ranging from variety selection to harvest training.

Model:

Sainpoly-Gothic greenhouse

Minimum order quantity:

3000 square meters

Brand:

SAINPOLY

Price terms:

EXW, FOB, CIF

Origin:

Weifang, Shandong

Delivery method:

Air/Sea/Land (upon request)

Payment methods:

Telegraphic transfer (T/T), letter of credit (L/C)

Delivery date:

30-60 days (depending on project size)

Production capacity:

Annual output of over 200 hectares

Packaging:

Unified classification and packaging according to international standards

Inquiry

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Product Description

【Gothic Greenhouse Specially for Year-round Factory Cultivation of Leafy Vegetables】

The SAINPOLY Gothic Greenhouse is designed for year-round factory cultivation of leafy vegetables. The natural thermal buoyancy ventilation effect of the pointed roof creates an ideal microclimate for leafy vegetable growth. Hot air rises along the curved surface and exits through top windows, while fresh air flows in naturally from side windows to form continuous circulating airflow.

Combined with the triple system of pad-and-fan cooling and external shading, the internal temperature can be steadily kept below 28℃ in summer, fundamentally preventing lettuce bolting and leaf scorch. Integrated internal thermal screens and hot water heating protect leafy vegetables from frost damage in winter, and the ebb-and-flow irrigation system saves 30–40% of water.

The main frame adopts Q235B or higher-grade steel with hot-dip galvanizing treatment, with a design service life of more than 15 years.

SAINPOLY provides full-process services including variety selection, water & fertilizer formula design, installation and planting operation training.

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Product Advantages

(Year-round Factory Cultivation of Leafy Vegetables) Pointed Roof Ventilation Commercial Gothic Multi-span Greenhouse Manufacturer・SAINPOLY 11 Durable and Sturdy Structure: The main frame is made of Q235B or higher standard steel and undergoes hot-dip galvanizing treatment, with a galvanized layer thickness ≥180g/m², far exceeding the standard for ordinary steel. A single column can bear several tons of load. The overall structure has a service life of more than 15 years, leading the industry in snow load resistance and wind uplift resistance.

(Year-round Factory Cultivation of Leafy Vegetables) Pointed Roof Ventilation Commercial Gothic Multi-span Greenhouse Manufacturer・SAINPOLY 12 Pointed Roof Thermal Buoyancy Ventilation to Prevent Lettuce Bolting :The natural thermal buoyancy ventilation effect of the Gothic pointed roof, together with pad-and-fan cooling and external shading, forms a triple cooling system. It keeps the greenhouse temperature steadily below 28℃ in summer to prevent leafy vegetable bolting fundamentally.

(Year-round Factory Cultivation of Leafy Vegetables) Pointed Roof Ventilation Commercial Gothic Multi-span Greenhouse Manufacturer・SAINPOLY 13 Intelligent Environment Control: Integrated with pad-and-fan system, external shading, internal thermal screens, ebb-and-flow irrigation and IoT control cabinet, supporting remote unified operation via mobile phones or PCs.

(Year-round Factory Cultivation of Leafy Vegetables) Pointed Roof Ventilation Commercial Gothic Multi-span Greenhouse Manufacturer・SAINPOLY 14 Factory direct supply, zero defect delivery: 90% self production rate | CE certification | 15 patents | Three inspection system (self inspection/mutual inspection/special inspection) | Factory zero defect delivery

(Year-round Factory Cultivation of Leafy Vegetables) Pointed Roof Ventilation Commercial Gothic Multi-span Greenhouse Manufacturer・SAINPOLY 15 Direct Supply from Source Factory with Reliable Quality:We provide customized services for climate data collection, structural strength verification, foundation design, environmental control selection, irrigation schemes, and supplementary lighting systems at the project site. We also provide installation drawings and engineer installation guidance.

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Technical Specifications

Parameter item	Standard Configuration	Optional Upgrade
span	8m,9.6m	Support for customization of various lengths
bay	4m	Support for customization of various lengths
Eave height	3m,4m,6m	Support for customization of various heights
Top Covering	PO film	PE film, PEP film, woven film
Side Covering	PO film	PE film, PEP film, woven film
Frame Galvanizing Layer	≥180g/m2	≥275g/㎡ galvanized followed by spray coating process
Snow Load Resistance	0.32kN/m2	0.2~0.8kN/m2
Wind Load Resistance	0.27kN/m2	0.2~0.8kN/m2
External Shading Screen	Electric black round wire mesh	Customizable with different shading rates
Internal Shading Screen	Electric aluminum foil reflective mesh	Customizable with different shading rates
Insulation Curtain	Oxford cloth+cotton+Oxford cloth	Upgradeable waterproof surface/Upgradeable foldiable thermal insulation quilt/Upgradeable double-layer inflatable film insulation
Heating System	Ordinary boiler heating	Finned tubes,warm air blowers, snow melting pipes/ Electric warm air blowers, fuel warm air blowers
Roof Ventilation Method	Electric film rolling window	Single and double-sided rack-and-pinion top windows
Side Ventilation Method	Electric film rolling window	Fan-pad forced ventilation
Control System	Manual electrical control cabinet	IoT intelligent automatic electrical control cabinet Optional mobile online control

Application and Solutions

Extremely cold in winter，conventional greenhouse vegetable crops will experience irreversible freezing damage.

Cold Resistance Insulation

The triple cooling system consisting of pointed-roof thermal buoyancy ventilation, pad-and-fan system and external shading maintains greenhouse temperature below 28℃, fundamentally preventing lettuce bolting and leaf scorch.

Heating system

Equipped with internal thermal screens and hot water heating, the nighttime temperature inside the greenhouse stays above 5℃. It eliminates frost risks for leafy vegetables and guarantees continuous supply throughout winter.

Smart Irrigation

Tidal irrigation/NFT hydroponic system, precise water and fertilizer control, saving 30-40% water and significantly improving fertilizer utilization efficiency.

Intelligent control system

Zoned independent environmental control and separated water & fertilizer pipelines inside the greenhouse support efficient parallel management of different crop varieties.

High-quality skeleton

Our greenhouses adopt hot-dip galvanized steel frames and insulated hollow glass, with a 10-year warranty period and a 20-year design service life.

Custom Commercial

Greenhouse Services

As the source production factory, we provide flexible fully customized services:

System selection

Depending on your needs, you can choose from CO2 disinfection system, hanging system, irrigation system, photovoltaic system, heating system, cooling system, fertilization system, hydroponic system, fish and vegetable symbiosis system, ventilation system, shading system.

Size customization

The eave height, opening, length, and span can be adjusted as needed, and special customization can be made according to planting needs and geographical features.

Film type

Ordinary drip proof film (traditional type 1-3 years), double-layer inflatable film system (to enhance thermal insulation), diffuse film (to let the light evenly spread on the vegetation), PO coating film (dust-proof, high light transmittance more than 90%), high light transmittance anti-aging drip proof film (service life is more than twice the traditional film) can be selected. The light transmittance is ≥ 90%, and the service life is extended by 3 to 5 years.

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SAINPOLY Full-Service Support

Customized design

Our design team will provide CAD construction drawings and load calculation reports based on your local climate, crop type, and budget. Span, eave height, covering material, insulation scheme, and environmental control system can all be customized according to your needs, fully matching your project requirements.

Precision manufacturing

As the source factory, our self production rate reaches 90%. Robot welding, laser cutting, and automatic stamping ensure machining accuracy. Each batch of products strictly follows the three inspection system and has passed multiple verifications such as CE certification and ISO.

On site technical guidance

Engineers go to the site to guide the local team, providing manuals, video tutorials, and daily quality checks.

Turnkey installation

A professional team is fully responsible for the foundation construction, final debugging, and delivery of a ready to use greenhouse.

After sales service

Remote troubleshooting and equipment debugging can be resolved remotely through video calls and data analysis. We will gradually guide your local personnel in the operation.

Regular maintenance training

Provide free online training every year to help your team master the latest maintenance techniques and new technologies.

FAQ

Q: Q: How is the natural ventilation performance of Gothic greenhouses?

A: The Gothic pointed roof creates natural thermal buoyancy ventilation. Hot air rises naturally and exits through the top windows. Compared with flat-roof greenhouses, its ventilation efficiency is greatly improved, which can effectively reduce the bolting risk of leafy vegetables in summer.

Q: Can hydroponic systems be integrated into Gothic greenhouses?

A: Yes. The greenhouse can be equipped with NFT nutrient film technique, DWC deep water culture or ebb-and-flow bench systems. We design the internal layout according to your selected hydroponic method and leafy vegetable varieties.

Q: How much water can tidal irrigation save compared to traditional flood irrigation?

A: Through nutrient solution recycling, ebb-and-flow irrigation saves 30–40% water compared with conventional flood irrigation, while fertilizer utilization efficiency is significantly improved.

Q: Do you provide installation services?

A: We offer two service modes: ① Our headquarters sends technicians for on-site guidance; ② We provide installation videos and manuals for remote assistance. Turnkey installation is also available as an option.

Q: What is the minimum order area?

A: There is no mandatory minimum limit. An area of over 3,000 square meters is recommended to share design and transportation costs. Sample projects are negotiable.

Q: Do your Gothic greenhouses for vegetable cultivation comply with EU standards?

A: Yes. Our greenhouses hold CE certification. All components, including steel structures, covering films, and sealants, meet relevant EU standards, and we can assist customers with local acceptance inspections.

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